Initial support for PGP decryption & signatures

aerc.go

@@ -166,6 +166,10 @@ func main() {
 		ui.EnableMouse()
 	}
 
+	logger.Println("Initializing PGP keyring")
+	lib.InitKeyring()
+	defer lib.UnlockKeyring()
+
 	logger.Println("Starting Unix server")
 	as, err := lib.StartServer(logger)
 	if err != nil {

commands/account/view.go

@@ -3,6 +3,7 @@ package account
 import (
 	"errors"
 
+	"git.sr.ht/~sircmpwn/aerc/lib"
 	"git.sr.ht/~sircmpwn/aerc/widgets"
 )
 
@@ -37,7 +38,10 @@ func (ViewMessage) Execute(aerc *widgets.Aerc, args []string) error {
 	if deleted {
 		return nil
 	}
-	viewer := widgets.NewMessageViewer(acct, aerc.Config(), store, msg)
+	lib.NewMessageStoreView(msg, store, aerc.DecryptKeys,
-	aerc.NewTab(viewer, msg.Envelope.Subject)
+		func(view lib.MessageView) {
+			viewer := widgets.NewMessageViewer(acct, aerc.Config(), view)
+			aerc.NewTab(viewer, msg.Envelope.Subject)
+		})
 	return nil
 }

commands/msg/delete.go

@@ -68,8 +68,11 @@ func (Delete) Execute(aerc *widgets.Aerc, args []string) error {
 				acct.Messages().Scroll()
 				return nil
 			}
-			nextMv := widgets.NewMessageViewer(acct, aerc.Config(), store, next)
+			lib.NewMessageStoreView(next, store, aerc.DecryptKeys,
-			aerc.ReplaceTab(mv, nextMv, next.Envelope.Subject)
+				func(view lib.MessageView) {
+					nextMv := widgets.NewMessageViewer(acct, aerc.Config(), view)
+					aerc.ReplaceTab(mv, nextMv, next.Envelope.Subject)
+				})
 		}
 	}
 	acct.Messages().Scroll()

commands/msgview/next.go

@@ -2,6 +2,7 @@ package msgview
 
 import (
 	"git.sr.ht/~sircmpwn/aerc/commands/account"
+	"git.sr.ht/~sircmpwn/aerc/lib"
 	"git.sr.ht/~sircmpwn/aerc/widgets"
 )
 
@@ -36,7 +37,10 @@ func (NextPrevMsg) Execute(aerc *widgets.Aerc, args []string) error {
 		aerc.RemoveTab(mv)
 		return nil
 	}
-	nextMv := widgets.NewMessageViewer(acct, aerc.Config(), store, nextMsg)
+	lib.NewMessageStoreView(nextMsg, store, aerc.DecryptKeys,
-	aerc.ReplaceTab(mv, nextMv, nextMsg.Envelope.Subject)
+		func(view lib.MessageView) {
+			nextMv := widgets.NewMessageViewer(acct, aerc.Config(), view)
+			aerc.ReplaceTab(mv, nextMv, nextMsg.Envelope.Subject)
+		})
 	return nil
 }

go.mod

@@ -9,8 +9,9 @@ require (
 	github.com/ddevault/go-libvterm v0.0.0-20190526194226-b7d861da3810
 	github.com/emersion/go-imap v1.0.4
 	github.com/emersion/go-imap-idle v0.0.0-20190519112320-2704abd7050e
-	github.com/emersion/go-maildir v0.0.0-20191218233049-14e25d3ea720
+	github.com/emersion/go-maildir v0.2.0
 	github.com/emersion/go-message v0.11.1
+	github.com/emersion/go-pgpmail v0.0.0-20200303213726-db035a3a4139
 	github.com/emersion/go-sasl v0.0.0-20191210011802-430746ea8b9b
 	github.com/emersion/go-smtp v0.12.1
 	github.com/fsnotify/fsnotify v1.4.7
@@ -33,6 +34,7 @@ require (
 	github.com/smartystreets/goconvey v0.0.0-20190710185942-9d28bd7c0945 // indirect
 	github.com/stretchr/testify v1.3.0
 	github.com/zenhack/go.notmuch v0.0.0-20190821052706-5a1961965cfb
+	golang.org/x/crypto v0.0.0-20200302210943-78000ba7a073
 	golang.org/x/net v0.0.0-20200301022130-244492dfa37a // indirect
 	golang.org/x/oauth2 v0.0.0-20200107190931-bf48bf16ab8d
 	golang.org/x/sys v0.0.0-20200302150141-5c8b2ff67527 // indirect
@@ -41,4 +43,6 @@ require (
 	gopkg.in/yaml.v2 v2.2.8 // indirect
 )
 
+replace golang.org/x/crypto => github.com/ProtonMail/crypto v1.0.1-0.20191122234321-e77a1f03baa0
+
 replace github.com/gdamore/tcell => git.sr.ht/~sircmpwn/tcell v0.0.0-20190807054800-3fdb6bc01a50

go.sum

@@ -3,15 +3,14 @@ git.sr.ht/~sircmpwn/getopt v0.0.0-20190808004552-daaf1274538b h1:da5JBQ6dcW14aWn
 git.sr.ht/~sircmpwn/getopt v0.0.0-20190808004552-daaf1274538b/go.mod h1:wMEGFFFNuPos7vHmWXfszqImLppbc0wEhh6JBfJIUgw=
 git.sr.ht/~sircmpwn/tcell v0.0.0-20190807054800-3fdb6bc01a50 h1:GEZXdK3vfsEGlRwlybiAvOnYLA4YKaVWxAQSn/BSkNw=
 git.sr.ht/~sircmpwn/tcell v0.0.0-20190807054800-3fdb6bc01a50/go.mod h1:Hjvr+Ofd+gLglo7RYKxxnzCBmev3BzsS67MebKS4zMM=
-github.com/DATA-DOG/go-sqlmock v1.3.3 h1:CWUqKXe0s8A2z6qCgkP4Kru7wC11YoAnoupUKFDnH08=
 github.com/DATA-DOG/go-sqlmock v1.3.3/go.mod h1:f/Ixk793poVmq4qj/V1dPUg2JEAKC73Q5eFN3EC/SaM=
+github.com/ProtonMail/crypto v1.0.1-0.20191122234321-e77a1f03baa0 h1:HNSciyt/mdq/xCqb5HSYimGr6Djb5rC8694BJqX2xOo=
+github.com/ProtonMail/crypto v1.0.1-0.20191122234321-e77a1f03baa0/go.mod h1:MBriIAodHvZ+YvwvMJWCTmseW/LkeVRPWp/iZKvee4g=
 github.com/creack/pty v1.1.9 h1:uDmaGzcdjhF4i/plgjmEsriH11Y0o7RKapEf/LDaM3w=
 github.com/creack/pty v1.1.9/go.mod h1:oKZEueFk5CKHvIhNR5MUki03XCEU+Q6VDXinZuGJ33E=
 github.com/danwakefield/fnmatch v0.0.0-20160403171240-cbb64ac3d964 h1:y5HC9v93H5EPKqaS1UYVg1uYah5Xf51mBfIoWehClUQ=
 github.com/danwakefield/fnmatch v0.0.0-20160403171240-cbb64ac3d964/go.mod h1:Xd9hchkHSWYkEqJwUGisez3G1QY8Ryz0sdWrLPMGjLk=
-github.com/davecgh/go-spew v1.1.0 h1:ZDRjVQ15GmhC3fiQ8ni8+OwkZQO4DARzQgrnXU1Liz8=
 github.com/davecgh/go-spew v1.1.0/go.mod h1:J7Y8YcW2NihsgmVo/mv3lAwl/skON4iLHjSsI+c5H38=
-github.com/davecgh/go-spew v1.1.1 h1:vj9j/u1bqnvCEfJOwUhtlOARqs3+rkHYY13jYWTU97c=
 github.com/davecgh/go-spew v1.1.1/go.mod h1:J7Y8YcW2NihsgmVo/mv3lAwl/skON4iLHjSsI+c5H38=
 github.com/ddevault/go-libvterm v0.0.0-20190526194226-b7d861da3810 h1:VlHKuIrEvuGlED53TkovT4AVUjrqTyeCt3wiqw1OsFc=
 github.com/ddevault/go-libvterm v0.0.0-20190526194226-b7d861da3810/go.mod h1:Ow1oE1Hr4xE7eWY2/Ih2kbcOyyXDH7G0XKv/I4yiCYs=
@@ -19,11 +18,12 @@ github.com/emersion/go-imap v1.0.4 h1:uiCAIHM6Z5Jwkma1zdNDWWXxSCqb+/xHBkHflD7XBr
 github.com/emersion/go-imap v1.0.4/go.mod h1:yKASt+C3ZiDAiCSssxg9caIckWF/JG7ZQTO7GAmvicU=
 github.com/emersion/go-imap-idle v0.0.0-20190519112320-2704abd7050e h1:L7bswVJZcf2YHofgom49oFRwVqmBj/qZqDy9/SJpZMY=
 github.com/emersion/go-imap-idle v0.0.0-20190519112320-2704abd7050e/go.mod h1:o14zPKCmEH5WC1vU5SdPoZGgNvQx7zzKSnxPQlobo78=
-github.com/emersion/go-maildir v0.0.0-20191218233049-14e25d3ea720 h1:0Hj2cVnV1NunzYK6Y9fjTdpeqHClF+QNTyiCyhIJ/0E=
+github.com/emersion/go-maildir v0.2.0 h1:fC4+UVGl8GcQGbFF7AWab2JMf4VbKz+bMNv07xxhzs8=
-github.com/emersion/go-maildir v0.0.0-20191218233049-14e25d3ea720/go.mod h1:I2j27lND/SRLgxROe50Vam81MSaqPFvJ0OHNnDZ7n84=
+github.com/emersion/go-maildir v0.2.0/go.mod h1:I2j27lND/SRLgxROe50Vam81MSaqPFvJ0OHNnDZ7n84=
 github.com/emersion/go-message v0.11.1 h1:0C/S4JIXDTSfXB1vpqdimAYyK4+79fgEAMQ0dSL+Kac=
 github.com/emersion/go-message v0.11.1/go.mod h1:C4jnca5HOTo4bGN9YdqNQM9sITuT3Y0K6bSUw9RklvY=
-github.com/emersion/go-sasl v0.0.0-20190817083125-240c8404624e h1:ba7YsgX5OV8FjGi5ZWml8Jng6oBrJAb3ahqWMJ5Ce8Q=
+github.com/emersion/go-pgpmail v0.0.0-20200303213726-db035a3a4139 h1:JTUbkRuQFtDrl5KHWR2jrh9SUeSDEEEjUcHJkXdAE2Q=
+github.com/emersion/go-pgpmail v0.0.0-20200303213726-db035a3a4139/go.mod h1:+Ovy1VQCUKPdjWkOiWvFoiFaWXkqn1PA793VvfEYWQU=
 github.com/emersion/go-sasl v0.0.0-20190817083125-240c8404624e/go.mod h1:G/dpzLu16WtQpBfQ/z3LYiYJn3ZhKSGWn83fyoyQe/k=
 github.com/emersion/go-sasl v0.0.0-20191210011802-430746ea8b9b h1:uhWtEWBHgop1rqEk2klKaxPAkVDCXexai6hSuRQ7Nvs=
 github.com/emersion/go-sasl v0.0.0-20191210011802-430746ea8b9b/go.mod h1:G/dpzLu16WtQpBfQ/z3LYiYJn3ZhKSGWn83fyoyQe/k=
@@ -39,21 +39,16 @@ github.com/go-ini/ini v1.52.0 h1:3UeUAveYUTCYV/G0jNDiIrrtIeAl1oAjshYyU2PaAlQ=
 github.com/go-ini/ini v1.52.0/go.mod h1:ByCAeIL28uOIIG0E3PJtZPDL8WnHpFKFOtgjp+3Ies8=
 github.com/golang/protobuf v1.2.0/go.mod h1:6lQm79b+lXiMfvg/cZm0SGofjICqVBUtrP5yJMmIC1U=
 github.com/golang/protobuf v1.3.1/go.mod h1:6lQm79b+lXiMfvg/cZm0SGofjICqVBUtrP5yJMmIC1U=
-github.com/golang/protobuf v1.3.4 h1:87PNWwrRvUSnqS4dlcBU/ftvOIBep4sYuBLlh6rX2wk=
 github.com/golang/protobuf v1.3.4/go.mod h1:vzj43D7+SQXF/4pzW/hwtAqwc6iTitCiVSaWz5lYuqw=
 github.com/google/shlex v0.0.0-20191202100458-e7afc7fbc510 h1:El6M4kTTCOh6aBiKaUGG7oYTSPP8MxqL4YI3kZKwcP4=
 github.com/google/shlex v0.0.0-20191202100458-e7afc7fbc510/go.mod h1:pupxD2MaaD3pAXIBCelhxNneeOaAeabZDe5s4K6zSpQ=
-github.com/gopherjs/gopherjs v0.0.0-20181017120253-0766667cb4d1 h1:EGx4pi6eqNxGaHF6qqu48+N2wcFQ5qg5FXgOdqsJ5d8=
 github.com/gopherjs/gopherjs v0.0.0-20181017120253-0766667cb4d1/go.mod h1:wJfORRmW1u3UXTncJ5qlYoELFm8eSnnEO6hX4iZ3EWY=
-github.com/gopherjs/gopherjs v0.0.0-20190430165422-3e4dfb77656c h1:7lF+Vz0LqiRidnzC1Oq86fpX1q/iEv2KJdrCtttYjT4=
 github.com/gopherjs/gopherjs v0.0.0-20190430165422-3e4dfb77656c/go.mod h1:wJfORRmW1u3UXTncJ5qlYoELFm8eSnnEO6hX4iZ3EWY=
 github.com/imdario/mergo v0.3.8 h1:CGgOkSJeqMRmt0D9XLWExdT4m4F1vd3FV3VPt+0VxkQ=
 github.com/imdario/mergo v0.3.8/go.mod h1:2EnlNZ0deacrJVfApfmtdGgDfMuh/nq6Ok1EcJh5FfA=
-github.com/jtolds/gls v4.20.0+incompatible h1:xdiiI2gbIgH/gLH7ADydsJ1uDOEzR8yvV7C0MuV77Wo=
 github.com/jtolds/gls v4.20.0+incompatible/go.mod h1:QJZ7F/aHp+rZTRtaJ1ow/lLfFfVYBRgL+9YlvaHOwJU=
 github.com/kyoh86/xdg v1.2.0 h1:CERuT/ShdTDj+A2UaX3hQ3mOV369+Sj+wyn2nIRIIkI=
 github.com/kyoh86/xdg v1.2.0/go.mod h1:/mg8zwu1+qe76oTFUBnyS7rJzk7LLC0VGEzJyJ19DHs=
-github.com/lucasb-eyer/go-colorful v1.0.2 h1:mCMFu6PgSozg9tDNMMK3g18oJBX7oYGrC09mS6CXfO4=
 github.com/lucasb-eyer/go-colorful v1.0.2/go.mod h1:0MS4r+7BZKSJ5mw4/S5MPN+qHFF1fYclkSPilDOKW0s=
 github.com/lucasb-eyer/go-colorful v1.0.3 h1:QIbQXiugsb+q10B+MI+7DI1oQLdmnep86tWFlaaUAac=
 github.com/lucasb-eyer/go-colorful v1.0.3/go.mod h1:R4dSotOR9KMtayYi1e77YzuveK+i7ruzyGqttikkLy0=
@@ -61,11 +56,9 @@ github.com/martinlindhe/base36 v1.0.0 h1:eYsumTah144C0A8P1T/AVSUk5ZoLnhfYFM3OGQx
 github.com/martinlindhe/base36 v1.0.0/go.mod h1:+AtEs8xrBpCeYgSLoY/aJ6Wf37jtBuR0s35750M27+8=
 github.com/mattn/go-isatty v0.0.12 h1:wuysRhFDzyxgEmMf5xjvJ2M9dZoWAXNNr5LSBS7uHXY=
 github.com/mattn/go-isatty v0.0.12/go.mod h1:cbi8OIDigv2wuxKPP5vlRcQ1OAZbq2CE4Kysco4FUpU=
-github.com/mattn/go-pointer v0.0.0-20180825124634-49522c3f3791 h1:PfHMsLQJwoc0ccjK0sam6J0wQo4s8mOuAo2yQGw+T2U=
 github.com/mattn/go-pointer v0.0.0-20180825124634-49522c3f3791/go.mod h1:2zXcozF6qYGgmsG+SeTZz3oAbFLdD3OWqnUbNvJZAlc=
 github.com/mattn/go-pointer v0.0.0-20190911064623-a0a44394634f h1:QTRRO+ozoYgT3CQRIzNVYJRU3DB8HRnkZv6mr4ISmMA=
 github.com/mattn/go-pointer v0.0.0-20190911064623-a0a44394634f/go.mod h1:2zXcozF6qYGgmsG+SeTZz3oAbFLdD3OWqnUbNvJZAlc=
-github.com/mattn/go-runewidth v0.0.4 h1:2BvfKmzob6Bmd4YsL0zygOqfdFnK7GR4QL06Do4/p7Y=
 github.com/mattn/go-runewidth v0.0.4/go.mod h1:LwmH8dsx7+W8Uxz3IHJYH5QSwggIsqBzpuz5H//U1FU=
 github.com/mattn/go-runewidth v0.0.8 h1:3tS41NlGYSmhhe/8fhGRzc+z3AYCw1Fe1WAyLuujKs0=
 github.com/mattn/go-runewidth v0.0.8/go.mod h1:H031xJmbD/WCDINGzjvQ9THkh0rPKHF+m2gUSrubnMI=
@@ -75,27 +68,20 @@ github.com/mitchellh/go-homedir v1.1.0 h1:lukF9ziXFxDFPkA1vsr5zpc1XuPDn/wFntq5mG
 github.com/mitchellh/go-homedir v1.1.0/go.mod h1:SfyaCUpYCn1Vlf4IUYiD9fPX4A5wJrkLzIz1N1q0pr0=
 github.com/pkg/errors v0.9.1 h1:FEBLx1zS214owpjy7qsBeixbURkuhQAwrK5UwLGTwt4=
 github.com/pkg/errors v0.9.1/go.mod h1:bwawxfHBFNV+L2hUp1rHADufV3IMtnDRdf1r5NINEl0=
-github.com/pmezard/go-difflib v1.0.0 h1:4DBwDE0NGyQoBHbLQYPwSUPoCMWR5BEzIk/f1lZbAQM=
 github.com/pmezard/go-difflib v1.0.0/go.mod h1:iKH77koFhYxTK1pcRnkKkqfTogsbg7gZNVY4sRDYZ/4=
 github.com/riywo/loginshell v0.0.0-20190610082906-2ed199a032f6 h1:0QWE8TiOGSB+korydW5z4hPQ5QBVqLos+M2ta4pHaY0=
 github.com/riywo/loginshell v0.0.0-20190610082906-2ed199a032f6/go.mod h1:/PfPXh0EntGc3QAAyUaviy4S9tzy4Zp0e2ilq4voC6E=
-github.com/smartystreets/assertions v0.0.0-20180927180507-b2de0cb4f26d h1:zE9ykElWQ6/NYmHa3jpm/yHnI4xSofP+UP6SpjHcSeM=
 github.com/smartystreets/assertions v0.0.0-20180927180507-b2de0cb4f26d/go.mod h1:OnSkiWE9lh6wB0YB77sQom3nweQdgAjqCqsofrRNTgc=
-github.com/smartystreets/assertions v1.0.1 h1:voD4ITNjPL5jjBfgR/r8fPIIBrliWrWHeiJApdr3r4w=
 github.com/smartystreets/assertions v1.0.1/go.mod h1:kHHU4qYBaI3q23Pp3VPrmWhuIUrLW/7eUrw0BU5VaoM=
-github.com/smartystreets/goconvey v0.0.0-20190710185942-9d28bd7c0945 h1:N8Bg45zpk/UcpNGnfJt2y/3lRWASHNTUET8owPYCgYI=
 github.com/smartystreets/goconvey v0.0.0-20190710185942-9d28bd7c0945/go.mod h1:syvi0/a8iFYH4r/RixwvyeAJjdLS9QV7WQ/tjFTllLA=
 github.com/stretchr/objx v0.1.0/go.mod h1:HFkY916IF+rwdDfMAkV7OtwuqBVzrE8GR6GFx+wExME=
-github.com/stretchr/testify v1.3.0 h1:TivCn/peBQ7UY8ooIcPgZFpTNSz0Q2U6UrFlUfqbe0Q=
 github.com/stretchr/testify v1.3.0/go.mod h1:M5WIy9Dh21IEIfnGCwXGc5bZfKNJtfHm1UVUgZn+9EI=
-github.com/zenhack/go.notmuch v0.0.0-20190821052706-5a1961965cfb h1:eZBIw4TilXSAEYcWKf51bERhwH431YwntDYus0Bgxh0=
 github.com/zenhack/go.notmuch v0.0.0-20190821052706-5a1961965cfb/go.mod h1:zJtFvR3NinVdmBiLyB4MyXKmqyVfZEb2cK97ISfTgV8=
-golang.org/x/crypto v0.0.0-20190308221718-c2843e01d9a2/go.mod h1:djNgcEr1/C05ACkg1iLfiJU5Ep61QUkGW8qpdssI0+w=
 golang.org/x/image v0.0.0-20190523035834-f03afa92d3ff/go.mod h1:kZ7UVZpmo3dzQBMxlp+ypCbDeSB+sBbTgSJuh5dn5js=
 golang.org/x/net v0.0.0-20180724234803-3673e40ba225/go.mod h1:mL1N/T3taQHkDXs73rZJwtUhF3w3ftmwwsq0BUmARs4=
 golang.org/x/net v0.0.0-20190108225652-1e06a53dbb7e/go.mod h1:mL1N/T3taQHkDXs73rZJwtUhF3w3ftmwwsq0BUmARs4=
-golang.org/x/net v0.0.0-20190311183353-d8887717615a h1:oWX7TPOiFAMXLq8o0ikBYfCJVlRHBcsciT5bXOrH628=
 golang.org/x/net v0.0.0-20190311183353-d8887717615a/go.mod h1:t9HGtf8HONx5eT2rtn7q6eTqICYqUVnKs3thJo3Qplg=
+golang.org/x/net v0.0.0-20190404232315-eb5bcb51f2a3/go.mod h1:t9HGtf8HONx5eT2rtn7q6eTqICYqUVnKs3thJo3Qplg=
 golang.org/x/net v0.0.0-20190603091049-60506f45cf65/go.mod h1:HSz+uSET+XFnRR8LxR5pz3Of3rY3CfYBVs4xY44aLks=
 golang.org/x/net v0.0.0-20200301022130-244492dfa37a h1:GuSPYbZzB5/dcLNCwLQLsg3obCJtX9IJhpXkvY7kzk0=
 golang.org/x/net v0.0.0-20200301022130-244492dfa37a/go.mod h1:z5CRVTTTmAJ677TzLLGU+0bjPO0LkuOLi4/5GtJWs/s=
@@ -103,22 +89,18 @@ golang.org/x/oauth2 v0.0.0-20200107190931-bf48bf16ab8d h1:TzXSXBo42m9gQenoE3b9BG
 golang.org/x/oauth2 v0.0.0-20200107190931-bf48bf16ab8d/go.mod h1:gOpvHmFTYa4IltrdGE7lF6nIHvwfUNPOp7c8zoXwtLw=
 golang.org/x/sync v0.0.0-20181221193216-37e7f081c4d4/go.mod h1:RxMgew5VJxzue5/jJTE5uejpjVlOe/izrB70Jof72aM=
 golang.org/x/sys v0.0.0-20190215142949-d0b11bdaac8a/go.mod h1:STP8DvDyc/dI5b8T5hshtkjS+E42TnysNCUPdjciGhY=
+golang.org/x/sys v0.0.0-20190412213103-97732733099d/go.mod h1:h1NjWce9XRLGQEsW7wpKNCjG9DtNlClVuFLEZdDNbEs=
 golang.org/x/sys v0.0.0-20190626150813-e07cf5db2756/go.mod h1:h1NjWce9XRLGQEsW7wpKNCjG9DtNlClVuFLEZdDNbEs=
 golang.org/x/sys v0.0.0-20200116001909-b77594299b42/go.mod h1:h1NjWce9XRLGQEsW7wpKNCjG9DtNlClVuFLEZdDNbEs=
 golang.org/x/sys v0.0.0-20200302150141-5c8b2ff67527 h1:uYVVQ9WP/Ds2ROhcaGPeIdVq0RIXVLwsHlnvJ+cT1So=
 golang.org/x/sys v0.0.0-20200302150141-5c8b2ff67527/go.mod h1:h1NjWce9XRLGQEsW7wpKNCjG9DtNlClVuFLEZdDNbEs=
-golang.org/x/text v0.3.0 h1:g61tztE5qeGQ89tm6NTjjM9VPIm088od1l6aSorWRWg=
 golang.org/x/text v0.3.0/go.mod h1:NqM8EUOU14njkJ3fqMW+pc6Ldnwhi/IjpwHt7yyuwOQ=
 golang.org/x/text v0.3.2 h1:tW2bmiBqwgJj/UpqtC8EpXEZVYOwU0yG4iWbprSVAcs=
 golang.org/x/text v0.3.2/go.mod h1:bEr9sfX3Q8Zfm5fL9x+3itogRgK3+ptLWKqgva+5dAk=
 golang.org/x/tools v0.0.0-20180917221912-90fa682c2a6e/go.mod h1:n7NCudcB/nEzxVGmLbDWY5pfWTLqBcC2KZ6jyYvM4mQ=
 golang.org/x/tools v0.0.0-20190328211700-ab21143f2384/go.mod h1:LCzVGOaR6xXOjkQ3onu1FJEFr0SW1gC7cKk1uF8kGRs=
 google.golang.org/appengine v1.4.0/go.mod h1:xpcJRLb0r/rnEns0DIKYYv+WjYCduHsrkT7/EB5XEv4=
-google.golang.org/appengine v1.6.5 h1:tycE03LOZYQNhDpS27tcQdAzLCVMaj7QT2SXxebnpCM=
 google.golang.org/appengine v1.6.5/go.mod h1:8WjMMxjGQR8xUklV/ARdw2HLXBOI7O7uCIDZVag1xfc=
-gopkg.in/check.v1 v0.0.0-20161208181325-20d25e280405 h1:yhCVgyC4o1eVCa2tZl7eS0r+SDo693bJlVdllGtEeKM=
 gopkg.in/check.v1 v0.0.0-20161208181325-20d25e280405/go.mod h1:Co6ibVJAznAaIkqp8huTwlJQCZ016jof/cbN4VW5Yz0=
-gopkg.in/ini.v1 v1.44.0 h1:YRJzTUp0kSYWUVFF5XAbDFfyiqwsl0Vb9R8TVP5eRi0=
 gopkg.in/ini.v1 v1.44.0/go.mod h1:pNLf8WUiyNEtQjuu5G5vTm06TEv9tsIgeAvK8hOrP4k=
-gopkg.in/yaml.v2 v2.2.8 h1:obN1ZagJSUGI0Ek/LBmuj4SNLPfIny3KsKFopxRdj10=
 gopkg.in/yaml.v2 v2.2.8/go.mod h1:hI93XBmqTisBFMUTm0b8Fm+jr3Dg1NNxqwp+5A1VGuI=

lib/keystore.go

@@ -0,0 +1,81 @@
+package lib
+
+import (
+	"io"
+	"os"
+	"path"
+
+	"github.com/kyoh86/xdg"
+	"golang.org/x/crypto/openpgp"
+	"golang.org/x/crypto/openpgp/packet"
+)
+
+var (
+	Keyring openpgp.EntityList
+
+	locked bool
+)
+
+func InitKeyring() {
+	os.MkdirAll(path.Join(xdg.DataHome(), "aerc"), 0700)
+
+	lockpath := path.Join(xdg.DataHome(), "aerc", "keyring.lock")
+	lockfile, err := os.OpenFile(lockpath, os.O_CREATE|os.O_EXCL, 0600)
+	if err != nil {
+		// TODO: Consider connecting to main process over IPC socket
+		locked = false
+	} else {
+		locked = true
+		lockfile.Close()
+	}
+
+	keypath := path.Join(xdg.DataHome(), "aerc", "keyring.asc")
+	keyfile, err := os.Open(keypath)
+	if os.IsNotExist(err) {
+		return
+	} else if err != nil {
+		panic(err)
+	}
+	defer keyfile.Close()
+
+	Keyring, err = openpgp.ReadKeyRing(keyfile)
+	if err != nil {
+		panic(err)
+	}
+}
+
+func UnlockKeyring() {
+	if !locked {
+		return
+	}
+	lockpath := path.Join(xdg.DataHome(), "aerc", "keyring.lock")
+	os.Remove(lockpath)
+}
+
+func ImportKeys(r io.Reader) error {
+	keys, err := openpgp.ReadKeyRing(r)
+	if err != nil {
+		return err
+	}
+	Keyring = append(Keyring, keys...)
+	if locked {
+		keypath := path.Join(xdg.DataHome(), "aerc", "keyring.asc")
+		keyfile, err := os.OpenFile(keypath, os.O_CREATE|os.O_APPEND, 0600)
+		if err != nil {
+			return err
+		}
+		defer keyfile.Close()
+
+		for _, key := range keys {
+			if key.PrivateKey != nil {
+				err = key.SerializePrivate(keyfile, &packet.Config{})
+			} else {
+				err = key.Serialize(keyfile)
+			}
+			if err != nil {
+				return err
+			}
+		}
+	}
+	return nil
+}

lib/messageview.go

@@ -0,0 +1,128 @@
+package lib
+
+import (
+	"bytes"
+	"io"
+	"io/ioutil"
+
+	"github.com/emersion/go-message"
+	_ "github.com/emersion/go-message/charset"
+	"github.com/emersion/go-pgpmail"
+	"golang.org/x/crypto/openpgp"
+
+	"git.sr.ht/~sircmpwn/aerc/models"
+	"git.sr.ht/~sircmpwn/aerc/worker/lib"
+)
+
+// This is an abstraction for viewing a message with semi-transparent PGP
+// support.
+type MessageView interface {
+	// Returns the MessageInfo for this message
+	MessageInfo() *models.MessageInfo
+
+	// Returns the BodyStructure for this message
+	BodyStructure() *models.BodyStructure
+
+	// Returns the message store that this message was originally sourced from
+	Store() *MessageStore
+
+	// Fetches a specific body part for this message
+	FetchBodyPart(parent *models.BodyStructure,
+		part []int, cb func(io.Reader))
+
+	PGPDetails() *openpgp.MessageDetails
+}
+
+func usePGP(info *models.BodyStructure) bool {
+	if info.MIMEType == "application" {
+		if info.MIMESubType == "pgp-encrypted" ||
+			info.MIMESubType == "pgp-signature" {
+
+			return true
+		}
+	}
+	for _, part := range info.Parts {
+		if usePGP(part) {
+			return true
+		}
+	}
+	return false
+}
+
+type MessageStoreView struct {
+	messageInfo   *models.MessageInfo
+	messageStore  *MessageStore
+	message       []byte
+	details       *openpgp.MessageDetails
+	bodyStructure *models.BodyStructure
+}
+
+func NewMessageStoreView(messageInfo *models.MessageInfo,
+	store *MessageStore, decryptKeys openpgp.PromptFunction,
+	cb func(MessageView)) {
+
+	msv := &MessageStoreView{messageInfo, store,
+		nil, nil, messageInfo.BodyStructure}
+
+	if usePGP(messageInfo.BodyStructure) {
+		store.FetchFull([]uint32{messageInfo.Uid}, func(reader io.Reader) {
+			pgpReader, err := pgpmail.Read(reader, Keyring, decryptKeys, nil)
+			if err != nil {
+				panic(err)
+			}
+			msv.message, err = ioutil.ReadAll(pgpReader.MessageDetails.UnverifiedBody)
+			if err != nil {
+				panic(err)
+			}
+			decrypted, err := message.Read(bytes.NewBuffer(msv.message))
+			if err != nil {
+				panic(err)
+			}
+			bs, err := lib.ParseEntityStructure(decrypted)
+			if err != nil {
+				panic(err)
+			}
+			msv.bodyStructure = bs
+			msv.details = pgpReader.MessageDetails
+			cb(msv)
+		})
+	} else {
+		cb(msv)
+	}
+}
+
+func (msv *MessageStoreView) MessageInfo() *models.MessageInfo {
+	return msv.messageInfo
+}
+
+func (msv *MessageStoreView) BodyStructure() *models.BodyStructure {
+	return msv.bodyStructure
+}
+
+func (msv *MessageStoreView) Store() *MessageStore {
+	return msv.messageStore
+}
+
+func (msv *MessageStoreView) PGPDetails() *openpgp.MessageDetails {
+	return msv.details
+}
+
+func (msv *MessageStoreView) FetchBodyPart(parent *models.BodyStructure,
+	part []int, cb func(io.Reader)) {
+
+	if msv.message == nil {
+		msv.messageStore.FetchBodyPart(msv.messageInfo.Uid, parent, part, cb)
+		return
+	}
+
+	buf := bytes.NewBuffer(msv.message)
+	msg, err := message.Read(buf)
+	if err != nil {
+		panic(err)
+	}
+	reader, err := lib.FetchEntityPartReader(msg, part)
+	if err != nil {
+		panic(err)
+	}
+	cb(reader)
+}

lib/ui/interfaces.go

@@ -16,6 +16,10 @@ type Drawable interface {
 	Invalidate()
 }
 
+type RootDrawable interface {
+	Initialize(ui *UI)
+}
+
 type Interactive interface {
 	// Returns true if the event was handled by this component
 	Event(event tcell.Event) bool

lib/ui/ui.go

@@ -55,6 +55,10 @@ func Initialize(content DrawableInteractiveBeeper) (*UI, error) {
 	content.OnBeep(screen.Beep)
 	content.Focus(true)
 
+	if root, ok := content.(RootDrawable); ok {
+		root.Initialize(&state)
+	}
+
 	return &state, nil
 }
 

widgets/aerc.go

@@ -2,6 +2,7 @@ package widgets
 
 import (
 	"errors"
+	"fmt"
 	"io"
 	"log"
 	"net/url"
@@ -10,6 +11,7 @@ import (
 
 	"github.com/gdamore/tcell"
 	"github.com/google/shlex"
+	"golang.org/x/crypto/openpgp"
 
 	"git.sr.ht/~sircmpwn/aerc/config"
 	"git.sr.ht/~sircmpwn/aerc/lib"
@@ -32,7 +34,9 @@ type Aerc struct {
 	pendingKeys []config.KeyStroke
 	prompts     *ui.Stack
 	tabs        *ui.Tabs
+	ui          *ui.UI
 	beep        func() error
+	getpasswd   *GetPasswd
 }
 
 func NewAerc(conf *config.AercConfig, logger *log.Logger,
@@ -160,6 +164,10 @@ func (aerc *Aerc) Focus(focus bool) {
 
 func (aerc *Aerc) Draw(ctx *ui.Context) {
 	aerc.grid.Draw(ctx)
+	if aerc.getpasswd != nil {
+		aerc.getpasswd.Draw(ctx.Subcontext(4, 4,
+			ctx.Width()-8, ctx.Height()-8))
+	}
 }
 
 func (aerc *Aerc) getBindings() *config.KeyBindings {
@@ -198,6 +206,10 @@ func (aerc *Aerc) simulate(strokes []config.KeyStroke) {
 }
 
 func (aerc *Aerc) Event(event tcell.Event) bool {
+	if aerc.getpasswd != nil {
+		return aerc.getpasswd.Event(event)
+	}
+
 	if aerc.focused != nil {
 		return aerc.focused.Event(event)
 	}
@@ -484,3 +496,39 @@ func (aerc *Aerc) CloseBackends() error {
 	}
 	return returnErr
 }
+
+func (aerc *Aerc) GetPassword(title string, prompt string, cb func(string)) {
+	aerc.getpasswd = NewGetPasswd(title, prompt, func(pw string) {
+		aerc.getpasswd = nil
+		aerc.Invalidate()
+		cb(pw)
+	})
+	aerc.getpasswd.OnInvalidate(func(_ ui.Drawable) {
+		aerc.Invalidate()
+	})
+	aerc.Invalidate()
+}
+
+func (aerc *Aerc) Initialize(ui *ui.UI) {
+	aerc.ui = ui
+}
+
+func (aerc *Aerc) DecryptKeys(keys []openpgp.Key, symmetric bool) ([]byte, error) {
+	// HACK HACK HACK
+	for _, key := range keys {
+		var ident *openpgp.Identity
+		for _, ident = range key.Entity.Identities {
+			break
+		}
+		aerc.GetPassword("Decrypt PGP private key",
+			fmt.Sprintf("Enter password for %s (%8X)",
+				ident.Name, key.PublicKey.KeyId),
+			func(pass string) {
+				key.PrivateKey.Decrypt([]byte(pass))
+			})
+		for aerc.getpasswd != nil {
+			aerc.ui.Tick()
+		}
+	}
+	return nil, nil
+}

widgets/getpasswd.go

@@ -0,0 +1,61 @@
+package widgets
+
+import (
+	"github.com/gdamore/tcell"
+
+	"git.sr.ht/~sircmpwn/aerc/lib/ui"
+)
+
+type GetPasswd struct {
+	ui.Invalidatable
+	callback func(string)
+	title    string
+	prompt   string
+	input    *ui.TextInput
+}
+
+func NewGetPasswd(title string, prompt string, cb func(string)) *GetPasswd {
+	getpasswd := &GetPasswd{
+		callback: cb,
+		title:    title,
+		prompt:   prompt,
+		input:    ui.NewTextInput("").Password(true).Prompt("Password: "),
+	}
+	getpasswd.input.OnInvalidate(func(_ ui.Drawable) {
+		getpasswd.Invalidate()
+	})
+	getpasswd.input.Focus(true)
+	return getpasswd
+}
+
+func (gp *GetPasswd) Draw(ctx *ui.Context) {
+	ctx.Fill(0, 0, ctx.Width(), ctx.Height(), ' ', tcell.StyleDefault)
+	ctx.Fill(0, 0, ctx.Width(), 1, ' ', tcell.StyleDefault.Reverse(true))
+	ctx.Printf(1, 0, tcell.StyleDefault.Reverse(true), "%s", gp.title)
+	ctx.Printf(1, 1, tcell.StyleDefault, gp.prompt)
+	gp.input.Draw(ctx.Subcontext(1, 3, ctx.Width()-2, 1))
+}
+
+func (gp *GetPasswd) Invalidate() {
+	gp.DoInvalidate(gp)
+}
+
+func (gp *GetPasswd) Event(event tcell.Event) bool {
+	switch event := event.(type) {
+	case *tcell.EventKey:
+		switch event.Key() {
+		case tcell.KeyEnter:
+			gp.input.Focus(false)
+			gp.callback(gp.input.String())
+		default:
+			gp.input.Event(event)
+		}
+	default:
+		gp.input.Event(event)
+	}
+	return true
+}
+
+func (gp *GetPasswd) Focus(f bool) {
+	// Who cares
+}

widgets/headerlayout.go

@@ -31,7 +31,7 @@ func (filter HeaderLayoutFilter) forMessage(msg *models.MessageInfo) HeaderLayou
 // grid builds a ui grid, populating each cell by calling a callback function
 // with the current header string.
 func (layout HeaderLayout) grid(cb func(string) ui.Drawable) (grid *ui.Grid, height int) {
-	rowCount := len(layout) + 1 // extra row for spacer
+	rowCount := len(layout)
 	grid = ui.MakeGrid(rowCount, 1, ui.SIZE_EXACT, ui.SIZE_WEIGHT)
 	for i, cols := range layout {
 		r := ui.MakeGrid(1, len(cols), ui.SIZE_EXACT, ui.SIZE_WEIGHT)
@@ -40,6 +40,5 @@ func (layout HeaderLayout) grid(cb func(string) ui.Drawable) (grid *ui.Grid, hei
 		}
 		grid.AddChild(r).At(i, 0)
 	}
-	grid.AddChild(ui.NewFill(' ')).At(rowCount-1, 0)
 	return grid, rowCount
 }

widgets/msglist.go

@@ -165,8 +165,11 @@ func (ml *MessageList) MouseEvent(localX int, localY int, event tcell.Event) {
 				if msg == nil {
 					return
 				}
-				viewer := NewMessageViewer(acct, ml.aerc.Config(), store, msg)
+				lib.NewMessageStoreView(msg, store, ml.aerc.DecryptKeys,
-				ml.aerc.NewTab(viewer, msg.Envelope.Subject)
+					func(view lib.MessageView) {
+						viewer := NewMessageViewer(acct, ml.aerc.Config(), view)
+						ml.aerc.NewTab(viewer, msg.Envelope.Subject)
+					})
 			}
 		case tcell.WheelDown:
 			if ml.store != nil {

widgets/msgviewer.go

@@ -30,9 +30,8 @@ type MessageViewer struct {
 	conf     *config.AercConfig
 	err      error
 	grid     *ui.Grid
-	msg      *models.MessageInfo
 	switcher *PartSwitcher
-	store    *lib.MessageStore
+	msg      lib.MessageView
 }
 
 type PartSwitcher struct {
@@ -46,8 +45,8 @@ type PartSwitcher struct {
 	mv     *MessageViewer
 }
 
-func NewMessageViewer(acct *AccountView, conf *config.AercConfig,
+func NewMessageViewer(acct *AccountView,
-	store *lib.MessageStore, msg *models.MessageInfo) *MessageViewer {
+	conf *config.AercConfig, msg lib.MessageView) *MessageViewer {
 
 	hf := HeaderLayoutFilter{
 		layout: HeaderLayout(conf.Viewer.HeaderLayout),
@@ -58,25 +57,40 @@ func NewMessageViewer(acct *AccountView, conf *config.AercConfig,
 			return false
 		},
 	}
-	layout := hf.forMessage(msg)
+	layout := hf.forMessage(msg.MessageInfo())
 	header, headerHeight := layout.grid(
 		func(header string) ui.Drawable {
 			return &HeaderView{
-				Name:  header,
+				Name: header,
-				Value: fmtHeader(msg, header, acct.UiConfig().TimestampFormat),
+				Value: fmtHeader(msg.MessageInfo(), header,
+					acct.UiConfig().TimestampFormat),
 			}
 		},
 	)
 
-	grid := ui.NewGrid().Rows([]ui.GridSpec{
+	rows := []ui.GridSpec{
 		{ui.SIZE_EXACT, headerHeight},
+	}
+
+	if msg.PGPDetails() != nil {
+		height := 1
+		if msg.PGPDetails().IsSigned && msg.PGPDetails().IsEncrypted {
+			height = 2
+		}
+		rows = append(rows, ui.GridSpec{ui.SIZE_EXACT, height})
+	}
+
+	rows = append(rows, []ui.GridSpec{
+		{ui.SIZE_EXACT, 1},
 		{ui.SIZE_WEIGHT, 1},
-	}).Columns([]ui.GridSpec{
+	}...)
+
+	grid := ui.NewGrid().Rows(rows).Columns([]ui.GridSpec{
 		{ui.SIZE_WEIGHT, 1},
 	})
 
 	switcher := &PartSwitcher{}
-	err := createSwitcher(acct, switcher, conf, store, msg)
+	err := createSwitcher(acct, switcher, conf, msg)
 	if err != nil {
 		return &MessageViewer{
 			err:  err,
@@ -86,14 +100,20 @@ func NewMessageViewer(acct *AccountView, conf *config.AercConfig,
 	}
 
 	grid.AddChild(header).At(0, 0)
-	grid.AddChild(switcher).At(1, 0)
+	if msg.PGPDetails() != nil {
+		grid.AddChild(NewPGPInfo(msg.PGPDetails())).At(1, 0)
+		grid.AddChild(ui.NewFill(' ')).At(2, 0)
+		grid.AddChild(switcher).At(3, 0)
+	} else {
+		grid.AddChild(ui.NewFill(' ')).At(1, 0)
+		grid.AddChild(switcher).At(2, 0)
+	}
 
 	mv := &MessageViewer{
 		acct:     acct,
 		conf:     conf,
 		grid:     grid,
 		msg:      msg,
-		store:    store,
 		switcher: switcher,
 	}
 	switcher.mv = mv
@@ -122,8 +142,8 @@ func fmtHeader(msg *models.MessageInfo, header string, timefmt string) string {
 	}
 }
 
-func enumerateParts(acct *AccountView, conf *config.AercConfig, store *lib.MessageStore,
+func enumerateParts(acct *AccountView, conf *config.AercConfig,
-	msg *models.MessageInfo, body *models.BodyStructure,
+	msg lib.MessageView, body *models.BodyStructure,
 	index []int) ([]*PartViewer, error) {
 
 	var parts []*PartViewer
@@ -134,14 +154,14 @@ func enumerateParts(acct *AccountView, conf *config.AercConfig, store *lib.Messa
 			pv := &PartViewer{part: part}
 			parts = append(parts, pv)
 			subParts, err := enumerateParts(
-				acct, conf, store, msg, part, curindex)
+				acct, conf, msg, part, curindex)
 			if err != nil {
 				return nil, err
 			}
 			parts = append(parts, subParts...)
 			continue
 		}
-		pv, err := NewPartViewer(acct, conf, store, msg, part, curindex)
+		pv, err := NewPartViewer(acct, conf, msg, part, curindex)
 		if err != nil {
 			return nil, err
 		}
@@ -150,17 +170,17 @@ func enumerateParts(acct *AccountView, conf *config.AercConfig, store *lib.Messa
 	return parts, nil
 }
 
-func createSwitcher(acct *AccountView, switcher *PartSwitcher, conf *config.AercConfig,
+func createSwitcher(acct *AccountView, switcher *PartSwitcher,
-	store *lib.MessageStore, msg *models.MessageInfo) error {
+	conf *config.AercConfig, msg lib.MessageView) error {
 
 	var err error
 	switcher.selected = -1
 	switcher.showHeaders = conf.Viewer.ShowHeaders
 	switcher.alwaysShowMime = conf.Viewer.AlwaysShowMime
 
-	if len(msg.BodyStructure.Parts) == 0 {
+	if len(msg.BodyStructure().Parts) == 0 {
 		switcher.selected = 0
-		pv, err := NewPartViewer(acct, conf, store, msg, msg.BodyStructure, []int{1})
+		pv, err := NewPartViewer(acct, conf, msg, msg.BodyStructure(), []int{1})
 		if err != nil {
 			return err
 		}
@@ -169,8 +189,8 @@ func createSwitcher(acct *AccountView, switcher *PartSwitcher, conf *config.Aerc
 			switcher.Invalidate()
 		})
 	} else {
-		switcher.parts, err = enumerateParts(acct, conf, store,
+		switcher.parts, err = enumerateParts(acct, conf, msg,
-			msg, msg.BodyStructure, []int{})
+			msg.BodyStructure(), []int{})
 		if err != nil {
 			return err
 		}
@@ -228,7 +248,7 @@ func (mv *MessageViewer) OnInvalidate(fn func(d ui.Drawable)) {
 }
 
 func (mv *MessageViewer) Store() *lib.MessageStore {
-	return mv.store
+	return mv.msg.Store()
 }
 
 func (mv *MessageViewer) SelectedAccount() *AccountView {
@@ -239,7 +259,7 @@ func (mv *MessageViewer) SelectedMessage() (*models.MessageInfo, error) {
 	if mv.msg == nil {
 		return nil, errors.New("no message selected")
 	}
-	return mv.msg, nil
+	return mv.msg.MessageInfo(), nil
 }
 
 func (mv *MessageViewer) MarkedMessages() ([]*models.MessageInfo, error) {
@@ -250,8 +270,7 @@ func (mv *MessageViewer) MarkedMessages() ([]*models.MessageInfo, error) {
 func (mv *MessageViewer) ToggleHeaders() {
 	switcher := mv.switcher
 	mv.conf.Viewer.ShowHeaders = !mv.conf.Viewer.ShowHeaders
-	err := createSwitcher(
+	err := createSwitcher(mv.acct, switcher, mv.conf, mv.msg)
-		mv.acct, switcher, mv.conf, mv.store, mv.msg)
 	if err != nil {
 		mv.acct.Logger().Printf(
 			"warning: error during create switcher - %v", err)
@@ -265,9 +284,9 @@ func (mv *MessageViewer) SelectedMessagePart() *PartInfo {
 
 	return &PartInfo{
 		Index: part.index,
-		Msg:   part.msg,
+		Msg:   part.msg.MessageInfo(),
 		Part:  part.part,
-		Store: part.store,
+		Store: mv.Store(),
 	}
 }
 
@@ -420,22 +439,20 @@ type PartViewer struct {
 	fetched     bool
 	filter      *exec.Cmd
 	index       []int
-	msg         *models.MessageInfo
+	msg         lib.MessageView
 	pager       *exec.Cmd
 	pagerin     io.WriteCloser
 	part        *models.BodyStructure
 	showHeaders bool
 	sink        io.WriteCloser
 	source      io.Reader
-	store       *lib.MessageStore
 	term        *Terminal
 	selecter    *Selecter
 	grid        *ui.Grid
 }
 
 func NewPartViewer(acct *AccountView, conf *config.AercConfig,
-	store *lib.MessageStore, msg *models.MessageInfo,
+	msg lib.MessageView, part *models.BodyStructure,
-	part *models.BodyStructure,
 	index []int) (*PartViewer, error) {
 
 	var (
@@ -452,6 +469,7 @@ func NewPartViewer(acct *AccountView, conf *config.AercConfig,
 
 	pager = exec.Command(cmd[0], cmd[1:]...)
 
+	info := msg.MessageInfo()
 	for _, f := range conf.Filters {
 		mime := strings.ToLower(part.MIMEType) +
 			"/" + strings.ToLower(part.MIMESubType)
@@ -464,13 +482,13 @@ func NewPartViewer(acct *AccountView, conf *config.AercConfig,
 			var header string
 			switch f.Header {
 			case "subject":
-				header = msg.Envelope.Subject
+				header = info.Envelope.Subject
 			case "from":
-				header = models.FormatAddresses(msg.Envelope.From)
+				header = models.FormatAddresses(info.Envelope.From)
 			case "to":
-				header = models.FormatAddresses(msg.Envelope.To)
+				header = models.FormatAddresses(info.Envelope.To)
 			case "cc":
-				header = models.FormatAddresses(msg.Envelope.Cc)
+				header = models.FormatAddresses(info.Envelope.Cc)
 			}
 			if f.Regex.Match([]byte(header)) {
 				filter = exec.Command("sh", "-c", f.Command)
@@ -521,7 +539,6 @@ func NewPartViewer(acct *AccountView, conf *config.AercConfig,
 		part:        part,
 		showHeaders: conf.Viewer.ShowHeaders,
 		sink:        pipe,
-		store:       store,
 		term:        term,
 		selecter:    selecter,
 		grid:        grid,
@@ -577,11 +594,12 @@ func (pv *PartViewer) attemptCopy() {
 			}()
 		}
 		go func() {
-			if pv.showHeaders && pv.msg.RFC822Headers != nil {
+			info := pv.msg.MessageInfo()
+			if pv.showHeaders && info.RFC822Headers != nil {
 				// header need to bypass the filter, else we run into issues
 				// with the filter messing with newlines etc.
 				// hence all writes in this block go directly to the pager
-				fields := pv.msg.RFC822Headers.Fields()
+				fields := info.RFC822Headers.Fields()
 				for fields.Next() {
 					var value string
 					var err error
@@ -594,8 +612,8 @@ func (pv *PartViewer) attemptCopy() {
 					pv.pagerin.Write([]byte(field))
 				}
 				// virtual header
-				if len(pv.msg.Labels) != 0 {
+				if len(info.Labels) != 0 {
-					labels := fmtHeader(pv.msg, "Labels", "")
+					labels := fmtHeader(info, "Labels", "")
 					pv.pagerin.Write([]byte(fmt.Sprintf("Labels: %s\n", labels)))
 				}
 				pv.pagerin.Write([]byte{'\n'})
@@ -635,7 +653,8 @@ func (pv *PartViewer) Draw(ctx *ui.Context) {
 		return
 	}
 	if !pv.fetched {
-		pv.store.FetchBodyPart(pv.msg.Uid, pv.msg.BodyStructure, pv.index, pv.SetSource)
+		pv.msg.FetchBodyPart(pv.msg.BodyStructure(),
+			pv.index, pv.SetSource)
 		pv.fetched = true
 	}
 	if pv.err != nil {

widgets/pgpinfo.go

@@ -0,0 +1,93 @@
+package widgets
+
+import (
+	"errors"
+
+	"git.sr.ht/~sircmpwn/aerc/lib/ui"
+
+	"github.com/gdamore/tcell"
+	"golang.org/x/crypto/openpgp"
+	pgperrors "golang.org/x/crypto/openpgp/errors"
+)
+
+type PGPInfo struct {
+	ui.Invalidatable
+	details *openpgp.MessageDetails
+}
+
+func NewPGPInfo(details *openpgp.MessageDetails) *PGPInfo {
+	return &PGPInfo{details: details}
+}
+
+func (p *PGPInfo) DrawSignature(ctx *ui.Context, offs bool) {
+	errorStyle := tcell.StyleDefault.Background(tcell.ColorRed).
+		Foreground(tcell.ColorWhite).Bold(true)
+	softErrorStyle := tcell.StyleDefault.Foreground(tcell.ColorYellow).
+		Reverse(true).Bold(true)
+	validStyle := tcell.StyleDefault.Foreground(tcell.ColorGreen).Bold(true)
+	header := "Signature "
+	if offs {
+		header += " "
+	}
+
+	// TODO: Nicer prompt for TOFU, fetch from keyserver, etc
+	if errors.Is(p.details.SignatureError, pgperrors.ErrUnknownIssuer) ||
+		p.details.SignedBy == nil {
+
+		x := ctx.Printf(0, 0, tcell.StyleDefault.Bold(true), "%s", header)
+		x += ctx.Printf(x, 0, softErrorStyle, " Unknown ")
+		x += ctx.Printf(x, 0, tcell.StyleDefault,
+			" Signed with unknown key (%8X); authenticity unknown",
+			p.details.SignedByKeyId)
+	} else if p.details.SignatureError != nil {
+		x := ctx.Printf(0, 0, tcell.StyleDefault.Bold(true), "%s", header)
+		x += ctx.Printf(x, 0, errorStyle, " ✗ Invalid! ")
+		x += ctx.Printf(x, 0, tcell.StyleDefault.
+			Foreground(tcell.ColorRed).Bold(true),
+			" This message may have been tampered with! (%s)",
+			p.details.SignatureError.Error())
+	} else {
+		entity := p.details.SignedBy.Entity
+		var ident *openpgp.Identity
+		// TODO: Pick identity more intelligently
+		for _, ident = range entity.Identities {
+			break
+		}
+		ctx.Fill(0, 0, ctx.Width(), ctx.Height(), ' ', validStyle)
+		x := ctx.Printf(0, 0, tcell.StyleDefault.Bold(true), "%s", header)
+		x += ctx.Printf(x, 0, validStyle, "✓ Signed ")
+		x += ctx.Printf(x, 0, tcell.StyleDefault,
+			"by %s (%8X)", ident.Name, p.details.SignedByKeyId)
+	}
+}
+
+func (p *PGPInfo) DrawEncryption(ctx *ui.Context, y int) {
+	validStyle := tcell.StyleDefault.Foreground(tcell.ColorGreen).Bold(true)
+	entity := p.details.DecryptedWith.Entity
+	var ident *openpgp.Identity
+	// TODO: Pick identity more intelligently
+	for _, ident = range entity.Identities {
+		break
+	}
+
+	x := ctx.Printf(0, y, tcell.StyleDefault.Bold(true), "Encryption ")
+	x += ctx.Printf(x, y, validStyle, "✓ Encrypted ")
+	x += ctx.Printf(x, y, tcell.StyleDefault,
+		"for %s (%8X) ", ident.Name, p.details.DecryptedWith.PublicKey.KeyId)
+}
+
+func (p *PGPInfo) Draw(ctx *ui.Context) {
+	ctx.Fill(0, 0, ctx.Width(), ctx.Height(), ' ', tcell.StyleDefault)
+	if p.details.IsSigned && p.details.IsEncrypted {
+		p.DrawSignature(ctx, true)
+		p.DrawEncryption(ctx, 1)
+	} else if p.details.IsSigned {
+		p.DrawSignature(ctx, false)
+	} else if p.details.IsEncrypted {
+		p.DrawEncryption(ctx, 0)
+	}
+}
+
+func (p *PGPInfo) Invalidate() {
+	p.DoInvalidate(p)
+}

worker/lib/parse.go

@@ -57,7 +57,7 @@ func splitMIME(m string) (string, string) {
 	return parts[0], parts[1]
 }
 
-func parseEntityStructure(e *message.Entity) (*models.BodyStructure, error) {
+func ParseEntityStructure(e *message.Entity) (*models.BodyStructure, error) {
 	var body models.BodyStructure
 	contentType, ctParams, err := e.Header.ContentType()
 	if err != nil {
@@ -86,7 +86,7 @@ func parseEntityStructure(e *message.Entity) (*models.BodyStructure, error) {
 			} else if err != nil {
 				return nil, err
 			}
-			ps, err := parseEntityStructure(part)
+			ps, err := ParseEntityStructure(part)
 			if err != nil {
 				return nil, fmt.Errorf("could not parse child entity structure: %v", err)
 			}
@@ -189,7 +189,7 @@ func MessageInfo(raw RawMessage) (*models.MessageInfo, error) {
 	if err != nil {
 		return nil, fmt.Errorf("could not read message: %v", err)
 	}
-	bs, err := parseEntityStructure(msg)
+	bs, err := ParseEntityStructure(msg)
 	if err != nil {
 		return nil, fmt.Errorf("could not get structure: %v", err)
 	}